Ap Calc AB
posted by Student .
Find the equation of the line normal to the curve at (0,0). (Normal lines are perpendicular to the tangent lines)
2y + sinx = xcoxy
I found the derivative to be (cosy  cosx)/ (2+ xsiny)
then the slope tangent is 0...then the slope perpendicular is undefined...so then is the normal equation..x=0?

If dy/dx = as you stated, yes, the slope is undefined. x=0